Inspection Procedure

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ DTC OUTPUT (DTC P0604) 
   1. Clear the DTC.
   2. Turn the ignition switch OFF.
   3. Disconnect the battery negative terminal and wait for 1 minute.
   4. Connect the battery negative terminal.
   5. Turn the ignition switch on (IG).
   6. Select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
   7. Read the DTCs.

      OK: 

      P0604 is not present. 

      NG: REPLACE ECM  (See REMOVAL )

      OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )